Impact assessment

Computer trading: stock market circuit breakers

Economic impact assessment on price-triggered circuit breakers.


Stock market circuit breakers (EIA4)

This file may not be suitable for users of assistive technology. Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email Please tell us what format you need. It will help us if you say what assistive technology you use.


This economic impact assessment looks at the impact of stock market circuit breakers. These price-triggered measures allow a cool down period and a batching of trades that can mitigate the problems of rapidly falling prices and large price swings.

This impact assessment was commissioned as part of the Foresight project on the future of computer trading.

Published 31 August 2012